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Document Designation and Title Year Select Item(s) D3145 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method 03 D3145 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method 01 D3145 Standard Test Method for Thermal Endurance of Electrical Insulating Varnishes by the Helical Coil Method 97